<template>
  <div>
    <h1>当前求和为:{{ sum }}</h1>
    <h3>当前求和放大十倍为:{{ bigSum }}</h3>
    <h3>{{ school }}学习{{ subject }}</h3>
    <select v-model.number="n">
      <option value="1">1</option>
      <option value="2">2</option>
      <option value="3">3</option>
    </select>
    <button @click="increment(n)">+</button>
    <button @click="decrement(n)">-</button>
    <button @click="incrementOdd(n)">当前求和为奇数再加</button>
    <button @click="incrementWait(n)">等一等再加</button>
  </div>
</template>

<script>
import {mapState, mapGetters, mapMutations} from 'vuex'

export default {
  name: "Count",
  data() {
    return {
      n: 1,
      // sum: 0
    }
  },
  computed: {

    // 借助mapState生成计算属性, 从state中读取数据(对象写法)
    // ...mapState({sum: 'sum', school: 'school', subject: 'subject'}),
    // 借助mapState生成计算属性, 从state中读取数据(数组写法)
    ...mapState(['sum', 'school', 'subject']),
    ...mapGetters(['bigSum'])
  },
  mounted() {
  },
  methods: {
    // increment() {
    //   this.$store.commit('JIA', this.n)
    // },
    // decrement() {
    //   this.$store.commit('JIAN', this.n)
    // },
    //借助mapMutations生成的对应的方法, 方法中会调用commit去联系mutations(对象的写法)
    ...mapMutations({increment: 'JIA', decrement: 'JIAN'}),
    // incrementOdd() {
    //   this.$store.dispatch('jiaOdd', this.n)
    // },
    // incrementWait() {
    //   this.$store.dispatch('jiaWait', this.n)
    // }
    ...mapActions({incrementOdd: 'jiaOdd', incrementWait: 'jiaWait'})

  }
}
</script>

<style scoped>

</style>